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@Nieren States FATENT Ormea@ LYMAN F. MUNGER, OF ROCHESTER, ASSIGNOR TOHIMSELF AND WALTER K. MARVIN, OF NEWv YORK, N. Y.

LOCKS.

Specification forming part of Letters Patent No. 46,531, dated February21, 1865.

To @ZZ whom it muy concern.-

Beit known that 1, LYuAN F. MUNGER, of Rochester, in the county ofMonroe and State of New York, have invented certain new and usefulImprovements in Locks; and I her` by declare that the following is afull, clear, and.

exact description ofthe same, reference being had to the accompanyingdrawings, in which- Figure l is an isometrical perspective view of theface of the lock as detached from the door, with the knob attached andthe key inserted. Fig. 2 is an elevation ot' the same with the skeletonguard-plate removed, showing the fence-tumbler in blue shade lines incontradistinction to the key-tumblers and bolt, which are left white.Fig. 3 is a sectional view of the lock on line x yof Fig. 2. Figs. 4 and5 are top views of the key-tumblers, the former showing the same setaccording to the frictional hold each of the tumblers, through theintermediary vof the furring-plates, has upon the others, the latterexhibiting the position assumed by the tumblers when thelock is workedwith the key inserted. Fig 6 is a Atop view of the tumblers with the keyinserted, and Figs. 7 and 8 are side views of the key-tumblers andfurringplates, respectively. This invention relates to that class oflocks in which one or more sliding or swinging tumblers are used inconnection with a stump fast to a plate independent of and detached fromthe bolt, the object of this invention being to produce such locks atcomparatively small cost, yet perfectly secure against picking, and notliable to get out of order.

This invention consists, first, in the combination, in a lock-case, offrictional key-tumblers, bolt, and fence-tumbler, together with thefollower or lever to actuate the same under the arrangement hereinafterdescribed, so that both the said key-tumblers and bolt, when actuated,shall move in planes parallel to each other, substantially ashereinafter set forth; second, in the combination withhorizontallysliding key-tumblers and doublegated bolt of adouble-actingfence-tumbler, operating as described, so as to lock thebolt7 whether shot out or withdrawn, substantially as hereinafter setforth; third, in the method, hereinafter described, of operating thekey-tumblers by forming a cam-groove in the fence-tumbler in combinationwith a pin passing through and when actuated by the fence-tumbler.

projecting' from the said key-tuinblers, the whole being arranged foroperation, substantially as hereinafter set forth.

To enable others to make and use my said invention, l shall now proceedto describe the construction and operation of a lock made in accordancewith my improvements.

And, referring to the drawings, Ais the lockcase. lt is or may be madeof a quadrangular form, closed on all sides, with suitable openings inthe front plate for the knob, shank, and key. I prefer to malie thefront plate of skeleton form so as to allow of ready inspection of` theparts of the lock whenever necessary. In one part with the bottom plateof the case, or otherwise permanently united thereto, are two projectingstuds, b, upon which the key-tumblers aie hung or fitted. A guide-piece,c, is provided for the more perfeet holding of the said tumblers inposition. To the case is further secured a block, d, shaped and locatedso as to admit of the insertion ofthe key in its proper relation to theaction of the tuinblers. Gage-blocks ei and a guide-pin, j', are alsofastened to the case for the purpose of guiding the fence-tumbler andthe bolt in their reciprocating travel when actuated by the bit or leverofthe knob. The key-tumblers, of which there may be more or lessaccording to the degree of security required, are composed of steelplates B, indented at the top and. bottom in conformity with the key andstump, respectively,'and at the sides in such manner as to slidehorizontally upon the studs b '11, before referred to. They are furtherslotted at g to admit of the pins It, which are fast to one of thefurring-plates, to pass through and project above the whole series oftumblers. Each tumbler is interposed between brass furring-plates C,having frictional contact therewith, so as to impart movement to orpartake it with the tumblers These furring-plates have indentations attheir sides, by which means they are hung upon the studs b, and a gatingis formed upon the under side for the purpose of allowing the stump tomove 'up to releasethe bolt. The bolt is here shown to slide in itsmortise and upon a guide-pin,f, horizontally-z e., in a line parallelwith the keytumblerslalthough vit will be readily understood that,without departure .tion upon a stationary pin, u, fast in the bottomplate of the lockcase. Y The fence-tumbler D, which is provided with thestump o, whereby the bolt is locked `in either of its extremeVpositions, is so com- Abined with the various parts of the lock be foredescribed as to both receive and impart the movements necessary for theoperation of the lock. lts movement is in this instance transversely tothe bolt and the key-tumblers,

and it is guided in said movement by blocks e e and the stud b. Theunder side of this tumbler is double camshaped so that by rotating theknob either to the right or to the left the tumbler will by the actionof the bit be elevated and depressed. The key-tumblers are operated bythe cam groove p in the fencetumbler, which, fitting the pin h willcause the key-tumblers to move laterally when up-anddown motion is imparted to the fence-tumbler.

The operation of this lock is as follows: The knob being turned upon itsaxis, the bit first comes in contact with the cam -face of thefencetumbler and lifts it, until the stump reaches the key-tumblers. It'the key-tumblers are unadj usted-z'. e., if the key is not inserted toplace the tumblers in such order as to open the gatethen thefence-tumbler will be checked in its upward movement and the knob cannotbe rotated any farther and no action can be had on the bolt; but it' thekey is inserted, then the upward movement ofthe fence-tumbler willdetermine the lateral displacement of the key-tumblers, according to thesteps or configuration ofthe key, in such manner as to open the gate-t.e., to bring the gating or fence notch of each keytumbler andfnrring-plate exactly opposite to the stump in the fencetumbler. y Now,on continuingthe motion ot the knob, the fence-tumbler is still furtherraised, and the stump will enter the gate of the Vkey-tumblers, thusreleasing the bolt, which is nowr pushed out by the bit to its fullstroke when theA bit, striking the cam q, will bring the fence-tumblerdown again, its stump entering the rear gating ofthe bolt, which thusbecomes locked, while the key-tumblers are shoved back by the downwardmotion ot' the fence-tumbler. The key may then be withdrawn. Forunlocking, the operationis precisely the' same, only the knob is turnedto the right instead of to the left.

From the above it will be seen that this my invention is susceptible ofsome modifications Without departure from its principle. Thus instead ofa cam-groove an` elbow-lever may be used and other minor alterationsmaybe made with more or less lbeneticialfresults, or a latch may becombined with the lock, under an arrangement such as to be operated bythe knob Withoutdistnrbing or actuating the tumblers.

Having thus described my invention, and

Vthe manner in which the same is or may be carried into effect, Iclaiml. The combination, in a lock-case, of frictional vkey-tumblers,bolt, and fence tumbler, together with the follower or lever to actuatethe same under the arrangement herein described, so thatboth the saidkey-tumblers and bolt when actuated shall move in planes parallel toeach other, substantially as set forth.

2. In combination with horizontally-sliding key-tumblers anddouble-gated bolt, the double-actin g fence-tumbler operating, asdescribed, so as to lock the bolt Whether shot out or withdrawn,substantially as set forth.

3. The method herein described of operatin g the key-tumblers by forminga cam-groove in the fence-tumbler in combination with a pin passingthrough and projecting from the said key-tumblers, the Whole beingarranged for operation substantially as set forth.

LYMAN F. MUNGER. W'itnesses: t

EDWIN TRUMP, y p MARION J. GREEN.

